public class Test {
    public static void main(String[] args) {

        Student student=new Student();
        student.name="jt";
        student.eat();
        student.id=1;
        student.class_="3";
        Student student2=new Student();
        student2.id=1;
        student.class_="33";
        System.out.println(student2==student);
        System.out.println(student2.hashCode()==student.hashCode());

    }
}
